How to detect massive memory copy ?

Hi!
I have a problem in my java program: it uses many off-heap operations, and I suspect that in some cases copying is too big by size of blocks or by rate.
So program constantly slow or become even more slow by load.
How to detect facts of massive copy of data in memory?
How to locate places in code which do it?
I want to use Intel Amplifier XE 2017 or any else appropriate tool.

Thanks in advance.